Libav
http.c
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1 /*
2  * HTTP protocol for avconv client
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "config.h"
23 
24 #if CONFIG_ZLIB
25 #include <zlib.h>
26 #endif /* CONFIG_ZLIB */
27 
28 #include "libavutil/avstring.h"
29 #include "libavutil/opt.h"
30 
31 #include "avformat.h"
32 #include "http.h"
33 #include "httpauth.h"
34 #include "internal.h"
35 #include "network.h"
36 #include "os_support.h"
37 #include "url.h"
38 
39 /* XXX: POST protocol is not completely implemented because avconv uses
40  * only a subset of it. */
41 
42 /* The IO buffer size is unrelated to the max URL size in itself, but needs
43  * to be large enough to fit the full request headers (including long
44  * path names). */
45 #define BUFFER_SIZE MAX_URL_SIZE
46 #define MAX_REDIRECTS 8
47 
48 typedef struct {
49  const AVClass *class;
51  unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
53  int http_code;
54  /* Used if "Transfer-Encoding: chunked" otherwise -1. */
55  int64_t chunksize;
56  int64_t off, end_off, filesize;
57  char *location;
60  char *headers;
61  char *mime_type;
62  char *user_agent;
63  char *content_type;
64  /* Set if the server correctly handles Connection: close and will close
65  * the connection after feeding us the content. */
66  int willclose;
68  /* A flag which indicates if the end of chunked encoding has been sent. */
70  /* A flag which indicates we have finished to read POST reply. */
72  /* A flag which indicates if we use persistent connections. */
76  int icy;
77  /* how much data was read since the last ICY metadata packet */
79  /* after how many bytes of read data a new metadata packet will be found */
84 #if CONFIG_ZLIB
85  int compressed;
86  z_stream inflate_stream;
87  uint8_t *inflate_buffer;
88 #endif /* CONFIG_ZLIB */
91  char *method;
92 } HTTPContext;
93 
94 #define OFFSET(x) offsetof(HTTPContext, x)
95 #define D AV_OPT_FLAG_DECODING_PARAM
96 #define E AV_OPT_FLAG_ENCODING_PARAM
97 #define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)
98 
99 static const AVOption options[] = {
100  { "chunked_post", "use chunked transfer-encoding for posts", OFFSET(chunked_post), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
101  { "headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
102  { "content_type", "set a specific content type for the POST messages", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
103  { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
104  { "user-agent", "override User-Agent header, for compatibility with ffmpeg", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = DEFAULT_USER_AGENT }, 0, 0, D },
105  { "multiple_requests", "use persistent connections", OFFSET(multiple_requests), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, D | E },
106  { "post_data", "set custom HTTP post data", OFFSET(post_data), AV_OPT_TYPE_BINARY, .flags = D | E },
107  { "mime_type", "export the MIME type", OFFSET(mime_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
108  { "icy", "request ICY metadata", OFFSET(icy), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, D },
109  { "icy_metadata_headers", "return ICY metadata headers", OFFSET(icy_metadata_headers), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
110  { "icy_metadata_packet", "return current ICY metadata packet", OFFSET(icy_metadata_packet), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_EXPORT },
111  { "metadata", "metadata read from the bitstream", OFFSET(metadata), AV_OPT_TYPE_DICT, {0}, 0, 0, AV_OPT_FLAG_EXPORT },
112  { "auth_type", "HTTP authentication type", OFFSET(auth_state.auth_type), AV_OPT_TYPE_INT, { .i64 = HTTP_AUTH_NONE }, HTTP_AUTH_NONE, HTTP_AUTH_BASIC, D | E, "auth_type"},
113  { "none", "No auth method set, autodetect", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_NONE }, 0, 0, D | E, "auth_type"},
114  { "basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, { .i64 = HTTP_AUTH_BASIC }, 0, 0, D | E, "auth_type"},
115  { "send_expect_100", "Force sending an Expect: 100-continue header for POST", OFFSET(send_expect_100), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E },
116  { "location", "The actual location of the data received", OFFSET(location), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D | E },
117  { "offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
118  { "end_offset", "try to limit the request to bytes preceding this offset", OFFSET(end_off), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, D },
119  { "method", "Override the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
120  { NULL }
121 };
122 
123 static int http_connect(URLContext *h, const char *path, const char *local_path,
124  const char *hoststr, const char *auth,
125  const char *proxyauth, int *new_location);
126 
128 {
129  memcpy(&((HTTPContext *)dest->priv_data)->auth_state,
130  &((HTTPContext *)src->priv_data)->auth_state,
131  sizeof(HTTPAuthState));
132  memcpy(&((HTTPContext *)dest->priv_data)->proxy_auth_state,
133  &((HTTPContext *)src->priv_data)->proxy_auth_state,
134  sizeof(HTTPAuthState));
135 }
136 
138 {
139  const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
140  char hostname[1024], hoststr[1024], proto[10];
141  char auth[1024], proxyauth[1024] = "";
142  char path1[MAX_URL_SIZE];
143  char buf[1024], urlbuf[MAX_URL_SIZE];
144  int port, use_proxy, err, location_changed = 0;
145  HTTPContext *s = h->priv_data;
146 
147  av_url_split(proto, sizeof(proto), auth, sizeof(auth),
148  hostname, sizeof(hostname), &port,
149  path1, sizeof(path1), s->location);
150  ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
151 
152  proxy_path = getenv("http_proxy");
153  use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
154  proxy_path && av_strstart(proxy_path, "http://", NULL);
155 
156  if (!strcmp(proto, "https")) {
157  lower_proto = "tls";
158  use_proxy = 0;
159  if (port < 0)
160  port = 443;
161  }
162  if (port < 0)
163  port = 80;
164 
165  if (path1[0] == '\0')
166  path = "/";
167  else
168  path = path1;
169  local_path = path;
170  if (use_proxy) {
171  /* Reassemble the request URL without auth string - we don't
172  * want to leak the auth to the proxy. */
173  ff_url_join(urlbuf, sizeof(urlbuf), proto, NULL, hostname, port, "%s",
174  path1);
175  path = urlbuf;
176  av_url_split(NULL, 0, proxyauth, sizeof(proxyauth),
177  hostname, sizeof(hostname), &port, NULL, 0, proxy_path);
178  }
179 
180  ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
181 
182  if (!s->hd) {
183  err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
184  &h->interrupt_callback, options);
185  if (err < 0)
186  return err;
187  }
188 
189  err = http_connect(h, path, local_path, hoststr,
190  auth, proxyauth, &location_changed);
191  if (err < 0)
192  return err;
193 
194  return location_changed;
195 }
196 
197 /* return non zero if error */
198 static int http_open_cnx(URLContext *h, AVDictionary **options)
199 {
200  HTTPAuthType cur_auth_type, cur_proxy_auth_type;
201  HTTPContext *s = h->priv_data;
202  int location_changed, attempts = 0, redirects = 0;
203 redo:
204  cur_auth_type = s->auth_state.auth_type;
205  cur_proxy_auth_type = s->auth_state.auth_type;
206 
207  location_changed = http_open_cnx_internal(h, options);
208  if (location_changed < 0)
209  goto fail;
210 
211  attempts++;
212  if (s->http_code == 401) {
213  if ((cur_auth_type == HTTP_AUTH_NONE || s->auth_state.stale) &&
214  s->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
215  ffurl_close(s->hd);
216  s->hd = NULL;
217  goto redo;
218  } else
219  goto fail;
220  }
221  if (s->http_code == 407) {
222  if ((cur_proxy_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
223  s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 4) {
224  ffurl_close(s->hd);
225  s->hd = NULL;
226  goto redo;
227  } else
228  goto fail;
229  }
230  if ((s->http_code == 301 || s->http_code == 302 ||
231  s->http_code == 303 || s->http_code == 307) &&
232  location_changed == 1) {
233  /* url moved, get next */
234  ffurl_close(s->hd);
235  s->hd = NULL;
236  if (redirects++ >= MAX_REDIRECTS)
237  return AVERROR(EIO);
238  /* Restart the authentication process with the new target, which
239  * might use a different auth mechanism. */
240  memset(&s->auth_state, 0, sizeof(s->auth_state));
241  attempts = 0;
242  location_changed = 0;
243  goto redo;
244  }
245  return 0;
246 
247 fail:
248  if (s->hd)
249  ffurl_close(s->hd);
250  s->hd = NULL;
251  return AVERROR(EIO);
252 }
253 
254 int ff_http_do_new_request(URLContext *h, const char *uri)
255 {
256  HTTPContext *s = h->priv_data;
257  AVDictionary *options = NULL;
258  int ret;
259 
260  s->off = 0;
261  s->icy_data_read = 0;
262  av_free(s->location);
263  s->location = av_strdup(uri);
264  if (!s->location)
265  return AVERROR(ENOMEM);
266 
267  av_dict_copy(&options, s->chained_options, 0);
268  ret = http_open_cnx(h, &options);
269  av_dict_free(&options);
270  return ret;
271 }
272 
273 static int http_open(URLContext *h, const char *uri, int flags,
274  AVDictionary **options)
275 {
276  HTTPContext *s = h->priv_data;
277  int ret;
278 
279  h->is_streamed = 1;
280 
281  s->filesize = -1;
282  s->location = av_strdup(uri);
283  if (!s->location)
284  return AVERROR(ENOMEM);
285  if (options)
286  av_dict_copy(&s->chained_options, *options, 0);
287 
288  if (s->headers) {
289  int len = strlen(s->headers);
290  if (len < 2 || strcmp("\r\n", s->headers + len - 2))
292  "No trailing CRLF found in HTTP header.\n");
293  }
294 
295  ret = http_open_cnx(h, options);
296  if (ret < 0)
298  return ret;
299 }
300 
301 static int http_getc(HTTPContext *s)
302 {
303  int len;
304  if (s->buf_ptr >= s->buf_end) {
305  len = ffurl_read(s->hd, s->buffer, BUFFER_SIZE);
306  if (len < 0) {
307  return len;
308  } else if (len == 0) {
309  return AVERROR_EOF;
310  } else {
311  s->buf_ptr = s->buffer;
312  s->buf_end = s->buffer + len;
313  }
314  }
315  return *s->buf_ptr++;
316 }
317 
318 static int http_get_line(HTTPContext *s, char *line, int line_size)
319 {
320  int ch;
321  char *q;
322 
323  q = line;
324  for (;;) {
325  ch = http_getc(s);
326  if (ch < 0)
327  return ch;
328  if (ch == '\n') {
329  /* process line */
330  if (q > line && q[-1] == '\r')
331  q--;
332  *q = '\0';
333 
334  return 0;
335  } else {
336  if ((q - line) < line_size - 1)
337  *q++ = ch;
338  }
339  }
340 }
341 
342 static int check_http_code(URLContext *h, int http_code, const char *end)
343 {
344  HTTPContext *s = h->priv_data;
345  /* error codes are 4xx and 5xx, but regard 401 as a success, so we
346  * don't abort until all headers have been parsed. */
347  if (http_code >= 400 && http_code < 600 &&
348  (http_code != 401 || s->auth_state.auth_type != HTTP_AUTH_NONE) &&
349  (http_code != 407 || s->proxy_auth_state.auth_type != HTTP_AUTH_NONE)) {
350  end += strspn(end, SPACE_CHARS);
351  av_log(h, AV_LOG_WARNING, "HTTP error %d %s\n", http_code, end);
352  return AVERROR(EIO);
353  }
354  return 0;
355 }
356 
357 static int parse_location(HTTPContext *s, const char *p)
358 {
359  char redirected_location[MAX_URL_SIZE], *new_loc;
360  ff_make_absolute_url(redirected_location, sizeof(redirected_location),
361  s->location, p);
362  new_loc = av_strdup(redirected_location);
363  if (!new_loc)
364  return AVERROR(ENOMEM);
365  av_free(s->location);
366  s->location = new_loc;
367  return 0;
368 }
369 
370 /* "bytes $from-$to/$document_size" */
371 static void parse_content_range(URLContext *h, const char *p)
372 {
373  HTTPContext *s = h->priv_data;
374  const char *slash;
375 
376  if (!strncmp(p, "bytes ", 6)) {
377  p += 6;
378  s->off = strtoll(p, NULL, 10);
379  if ((slash = strchr(p, '/')) && strlen(slash) > 0)
380  s->filesize = strtoll(slash + 1, NULL, 10);
381  }
382  h->is_streamed = 0; /* we _can_ in fact seek */
383 }
384 
385 static int parse_content_encoding(URLContext *h, const char *p)
386 {
387  if (!av_strncasecmp(p, "gzip", 4) ||
388  !av_strncasecmp(p, "deflate", 7)) {
389 #if CONFIG_ZLIB
390  HTTPContext *s = h->priv_data;
391 
392  s->compressed = 1;
393  inflateEnd(&s->inflate_stream);
394  if (inflateInit2(&s->inflate_stream, 32 + 15) != Z_OK) {
395  av_log(h, AV_LOG_WARNING, "Error during zlib initialisation: %s\n",
396  s->inflate_stream.msg);
397  return AVERROR(ENOSYS);
398  }
399  if (zlibCompileFlags() & (1 << 17)) {
401  "Your zlib was compiled without gzip support.\n");
402  return AVERROR(ENOSYS);
403  }
404 #else
406  "Compressed (%s) content, need zlib with gzip support\n", p);
407  return AVERROR(ENOSYS);
408 #endif /* CONFIG_ZLIB */
409  } else if (!av_strncasecmp(p, "identity", 8)) {
410  // The normal, no-encoding case (although servers shouldn't include
411  // the header at all if this is the case).
412  } else {
413  av_log(h, AV_LOG_WARNING, "Unknown content coding: %s\n", p);
414  return AVERROR(ENOSYS);
415  }
416  return 0;
417 }
418 
419 // Concat all Icy- header lines
420 static int parse_icy(HTTPContext *s, const char *tag, const char *p)
421 {
422  int len = 4 + strlen(p) + strlen(tag);
423  int is_first = !s->icy_metadata_headers;
424  int ret;
425 
426  av_dict_set(&s->metadata, tag, p, 0);
427 
428  if (s->icy_metadata_headers)
429  len += strlen(s->icy_metadata_headers);
430 
431  if ((ret = av_reallocp(&s->icy_metadata_headers, len)) < 0)
432  return ret;
433 
434  if (is_first)
435  *s->icy_metadata_headers = '\0';
436 
437  av_strlcatf(s->icy_metadata_headers, len, "%s: %s\n", tag, p);
438 
439  return 0;
440 }
441 
442 static int process_line(URLContext *h, char *line, int line_count,
443  int *new_location)
444 {
445  HTTPContext *s = h->priv_data;
446  char *tag, *p, *end;
447  int ret;
448 
449  /* end of header */
450  if (line[0] == '\0') {
451  s->end_header = 1;
452  return 0;
453  }
454 
455  p = line;
456  if (line_count == 0) {
457  while (!av_isspace(*p) && *p != '\0')
458  p++;
459  while (av_isspace(*p))
460  p++;
461  s->http_code = strtol(p, &end, 10);
462 
463  av_dlog(NULL, "http_code=%d\n", s->http_code);
464 
465  if ((ret = check_http_code(h, s->http_code, end)) < 0)
466  return ret;
467  } else {
468  while (*p != '\0' && *p != ':')
469  p++;
470  if (*p != ':')
471  return 1;
472 
473  *p = '\0';
474  tag = line;
475  p++;
476  while (av_isspace(*p))
477  p++;
478  if (!av_strcasecmp(tag, "Location")) {
479  if ((ret = parse_location(s, p)) < 0)
480  return ret;
481  *new_location = 1;
482  } else if (!av_strcasecmp(tag, "Content-Length") && s->filesize == -1) {
483  s->filesize = strtoll(p, NULL, 10);
484  } else if (!av_strcasecmp(tag, "Content-Range")) {
485  parse_content_range(h, p);
486  } else if (!av_strcasecmp(tag, "Accept-Ranges") &&
487  !strncmp(p, "bytes", 5)) {
488  h->is_streamed = 0;
489  } else if (!av_strcasecmp(tag, "Transfer-Encoding") &&
490  !av_strncasecmp(p, "chunked", 7)) {
491  s->filesize = -1;
492  s->chunksize = 0;
493  } else if (!av_strcasecmp(tag, "WWW-Authenticate")) {
495  } else if (!av_strcasecmp(tag, "Authentication-Info")) {
497  } else if (!av_strcasecmp(tag, "Proxy-Authenticate")) {
499  } else if (!av_strcasecmp(tag, "Connection")) {
500  if (!strcmp(p, "close"))
501  s->willclose = 1;
502  } else if (!av_strcasecmp(tag, "Content-Type")) {
503  av_free(s->mime_type);
504  s->mime_type = av_strdup(p);
505  } else if (!av_strcasecmp(tag, "Icy-MetaInt")) {
506  s->icy_metaint = strtoll(p, NULL, 10);
507  } else if (!av_strncasecmp(tag, "Icy-", 4)) {
508  if ((ret = parse_icy(s, tag, p)) < 0)
509  return ret;
510  } else if (!av_strcasecmp(tag, "Content-Encoding")) {
511  if ((ret = parse_content_encoding(h, p)) < 0)
512  return ret;
513  }
514  }
515  return 1;
516 }
517 
518 static inline int has_header(const char *str, const char *header)
519 {
520  /* header + 2 to skip over CRLF prefix. (make sure you have one!) */
521  if (!str)
522  return 0;
523  return av_stristart(str, header + 2, NULL) || av_stristr(str, header);
524 }
525 
526 static int http_read_header(URLContext *h, int *new_location)
527 {
528  HTTPContext *s = h->priv_data;
529  char line[MAX_URL_SIZE];
530  int err = 0;
531 
532  s->chunksize = -1;
533 
534  for (;;) {
535  if ((err = http_get_line(s, line, sizeof(line))) < 0)
536  return err;
537 
538  av_dlog(NULL, "header='%s'\n", line);
539 
540  err = process_line(h, line, s->line_count, new_location);
541  if (err < 0)
542  return err;
543  if (err == 0)
544  break;
545  s->line_count++;
546  }
547 
548  return err;
549 }
550 
551 static int http_connect(URLContext *h, const char *path, const char *local_path,
552  const char *hoststr, const char *auth,
553  const char *proxyauth, int *new_location)
554 {
555  HTTPContext *s = h->priv_data;
556  int post, err;
557  char headers[HTTP_HEADERS_SIZE] = "";
558  char *authstr = NULL, *proxyauthstr = NULL;
559  int64_t off = s->off;
560  int len = 0;
561  const char *method;
562  int send_expect_100 = 0;
563 
564  /* send http header */
565  post = h->flags & AVIO_FLAG_WRITE;
566 
567  if (s->post_data) {
568  /* force POST method and disable chunked encoding when
569  * custom HTTP post data is set */
570  post = 1;
571  s->chunked_post = 0;
572  }
573 
574  if (s->method)
575  method = s->method;
576  else
577  method = post ? "POST" : "GET";
578 
579  authstr = ff_http_auth_create_response(&s->auth_state, auth,
580  local_path, method);
581  proxyauthstr = ff_http_auth_create_response(&s->proxy_auth_state, proxyauth,
582  local_path, method);
583  if (post && !s->post_data) {
584  send_expect_100 = s->send_expect_100;
585  /* The user has supplied authentication but we don't know the auth type,
586  * send Expect: 100-continue to get the 401 response including the
587  * WWW-Authenticate header, or an 100 continue if no auth actually
588  * is needed. */
589  if (auth && *auth &&
591  s->http_code != 401)
592  send_expect_100 = 1;
593  }
594 
595  /* set default headers if needed */
596  if (!has_header(s->headers, "\r\nUser-Agent: "))
597  len += av_strlcatf(headers + len, sizeof(headers) - len,
598  "User-Agent: %s\r\n", s->user_agent);
599  if (!has_header(s->headers, "\r\nAccept: "))
600  len += av_strlcpy(headers + len, "Accept: */*\r\n",
601  sizeof(headers) - len);
602  // Note: we send this on purpose even when s->off is 0 when we're probing,
603  // since it allows us to detect more reliably if a (non-conforming)
604  // server supports seeking by analysing the reply headers.
605  if (!has_header(s->headers, "\r\nRange: ") && !post) {
606  len += av_strlcatf(headers + len, sizeof(headers) - len,
607  "Range: bytes=%"PRId64"-", s->off);
608  if (s->end_off)
609  len += av_strlcatf(headers + len, sizeof(headers) - len,
610  "%"PRId64, s->end_off - 1);
611  len += av_strlcpy(headers + len, "\r\n",
612  sizeof(headers) - len);
613  }
614  if (send_expect_100 && !has_header(s->headers, "\r\nExpect: "))
615  len += av_strlcatf(headers + len, sizeof(headers) - len,
616  "Expect: 100-continue\r\n");
617 
618  if (!has_header(s->headers, "\r\nConnection: ")) {
619  if (s->multiple_requests)
620  len += av_strlcpy(headers + len, "Connection: keep-alive\r\n",
621  sizeof(headers) - len);
622  else
623  len += av_strlcpy(headers + len, "Connection: close\r\n",
624  sizeof(headers) - len);
625  }
626 
627  if (!has_header(s->headers, "\r\nHost: "))
628  len += av_strlcatf(headers + len, sizeof(headers) - len,
629  "Host: %s\r\n", hoststr);
630  if (!has_header(s->headers, "\r\nContent-Length: ") && s->post_data)
631  len += av_strlcatf(headers + len, sizeof(headers) - len,
632  "Content-Length: %d\r\n", s->post_datalen);
633 
634  if (!has_header(s->headers, "\r\nContent-Type: ") && s->content_type)
635  len += av_strlcatf(headers + len, sizeof(headers) - len,
636  "Content-Type: %s\r\n", s->content_type);
637  if (!has_header(s->headers, "\r\nIcy-MetaData: ") && s->icy)
638  len += av_strlcatf(headers + len, sizeof(headers) - len,
639  "Icy-MetaData: %d\r\n", 1);
640 
641  /* now add in custom headers */
642  if (s->headers)
643  av_strlcpy(headers + len, s->headers, sizeof(headers) - len);
644 
645  snprintf(s->buffer, sizeof(s->buffer),
646  "%s %s HTTP/1.1\r\n"
647  "%s"
648  "%s"
649  "%s"
650  "%s%s"
651  "\r\n",
652  method,
653  path,
654  post && s->chunked_post ? "Transfer-Encoding: chunked\r\n" : "",
655  headers,
656  authstr ? authstr : "",
657  proxyauthstr ? "Proxy-" : "", proxyauthstr ? proxyauthstr : "");
658 
659  av_freep(&authstr);
660  av_freep(&proxyauthstr);
661  if ((err = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
662  return err;
663 
664  if (s->post_data)
665  if ((err = ffurl_write(s->hd, s->post_data, s->post_datalen)) < 0)
666  return err;
667 
668  /* init input buffer */
669  s->buf_ptr = s->buffer;
670  s->buf_end = s->buffer;
671  s->line_count = 0;
672  s->off = 0;
673  s->icy_data_read = 0;
674  s->filesize = -1;
675  s->willclose = 0;
676  s->end_chunked_post = 0;
677  s->end_header = 0;
678  if (post && !s->post_data && !send_expect_100) {
679  /* Pretend that it did work. We didn't read any header yet, since
680  * we've still to send the POST data, but the code calling this
681  * function will check http_code after we return. */
682  s->http_code = 200;
683  return 0;
684  }
685 
686  /* wait for header */
687  err = http_read_header(h, new_location);
688  if (err < 0)
689  return err;
690 
691  return (off == s->off) ? 0 : -1;
692 }
693 
694 static int http_buf_read(URLContext *h, uint8_t *buf, int size)
695 {
696  HTTPContext *s = h->priv_data;
697  int len;
698  /* read bytes from input buffer first */
699  len = s->buf_end - s->buf_ptr;
700  if (len > 0) {
701  if (len > size)
702  len = size;
703  memcpy(buf, s->buf_ptr, len);
704  s->buf_ptr += len;
705  } else {
706  if ((!s->willclose || s->chunksize < 0) &&
707  s->filesize >= 0 && s->off >= s->filesize)
708  return AVERROR_EOF;
709  len = ffurl_read(s->hd, buf, size);
710  }
711  if (len > 0) {
712  s->off += len;
713  if (s->chunksize > 0)
714  s->chunksize -= len;
715  }
716  return len;
717 }
718 
719 #if CONFIG_ZLIB
720 #define DECOMPRESS_BUF_SIZE (256 * 1024)
721 static int http_buf_read_compressed(URLContext *h, uint8_t *buf, int size)
722 {
723  HTTPContext *s = h->priv_data;
724  int ret;
725 
726  if (!s->inflate_buffer) {
727  s->inflate_buffer = av_malloc(DECOMPRESS_BUF_SIZE);
728  if (!s->inflate_buffer)
729  return AVERROR(ENOMEM);
730  }
731 
732  if (s->inflate_stream.avail_in == 0) {
733  int read = http_buf_read(h, s->inflate_buffer, DECOMPRESS_BUF_SIZE);
734  if (read <= 0)
735  return read;
736  s->inflate_stream.next_in = s->inflate_buffer;
737  s->inflate_stream.avail_in = read;
738  }
739 
740  s->inflate_stream.avail_out = size;
741  s->inflate_stream.next_out = buf;
742 
743  ret = inflate(&s->inflate_stream, Z_SYNC_FLUSH);
744  if (ret != Z_OK && ret != Z_STREAM_END)
745  av_log(h, AV_LOG_WARNING, "inflate return value: %d, %s\n",
746  ret, s->inflate_stream.msg);
747 
748  return size - s->inflate_stream.avail_out;
749 }
750 #endif /* CONFIG_ZLIB */
751 
752 static int http_read_stream(URLContext *h, uint8_t *buf, int size)
753 {
754  HTTPContext *s = h->priv_data;
755  int err, new_location;
756 
757  if (!s->hd)
758  return AVERROR_EOF;
759 
760  if (s->end_chunked_post && !s->end_header) {
761  err = http_read_header(h, &new_location);
762  if (err < 0)
763  return err;
764  }
765 
766  if (s->chunksize >= 0) {
767  if (!s->chunksize) {
768  char line[32];
769 
770  for (;;) {
771  do {
772  if ((err = http_get_line(s, line, sizeof(line))) < 0)
773  return err;
774  } while (!*line); /* skip CR LF from last chunk */
775 
776  s->chunksize = strtoll(line, NULL, 16);
777 
778  av_dlog(NULL, "Chunked encoding data size: %"PRId64"'\n",
779  s->chunksize);
780 
781  if (!s->chunksize)
782  return 0;
783  break;
784  }
785  }
786  size = FFMIN(size, s->chunksize);
787  }
788 #if CONFIG_ZLIB
789  if (s->compressed)
790  return http_buf_read_compressed(h, buf, size);
791 #endif /* CONFIG_ZLIB */
792  return http_buf_read(h, buf, size);
793 }
794 
795 static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
796 {
797  int pos = 0;
798  while (pos < size) {
799  int len = http_read_stream(h, buf + pos, size - pos);
800  if (len < 0)
801  return len;
802  pos += len;
803  }
804  return pos;
805 }
806 
807 static void update_metadata(HTTPContext *s, char *data)
808 {
809  char *key;
810  char *val;
811  char *end;
812  char *next = data;
813 
814  while (*next) {
815  key = next;
816  val = strstr(key, "='");
817  if (!val)
818  break;
819  end = strstr(val, "';");
820  if (!end)
821  break;
822 
823  *val = '\0';
824  *end = '\0';
825  val += 2;
826 
827  av_dict_set(&s->metadata, key, val, 0);
828 
829  next = end + 2;
830  }
831 }
832 
833 static int store_icy(URLContext *h, int size)
834 {
835  HTTPContext *s = h->priv_data;
836  /* until next metadata packet */
837  int remaining = s->icy_metaint - s->icy_data_read;
838 
839  if (remaining < 0)
840  return AVERROR_INVALIDDATA;
841 
842  if (!remaining) {
843  /* The metadata packet is variable sized. It has a 1 byte header
844  * which sets the length of the packet (divided by 16). If it's 0,
845  * the metadata doesn't change. After the packet, icy_metaint bytes
846  * of normal data follows. */
847  uint8_t ch;
848  int len = http_read_stream_all(h, &ch, 1);
849  if (len < 0)
850  return len;
851  if (ch > 0) {
852  char data[255 * 16 + 1];
853  int ret;
854  len = ch * 16;
855  ret = http_read_stream_all(h, data, len);
856  if (ret < 0)
857  return ret;
858  data[len + 1] = 0;
859  if ((ret = av_opt_set(s, "icy_metadata_packet", data, 0)) < 0)
860  return ret;
861  update_metadata(s, data);
862  }
863  s->icy_data_read = 0;
864  remaining = s->icy_metaint;
865  }
866 
867  return FFMIN(size, remaining);
868 }
869 
870 static int http_read(URLContext *h, uint8_t *buf, int size)
871 {
872  HTTPContext *s = h->priv_data;
873 
874  if (s->icy_metaint > 0) {
875  size = store_icy(h, size);
876  if (size < 0)
877  return size;
878  }
879 
880  size = http_read_stream(h, buf, size);
881  if (size > 0)
882  s->icy_data_read += size;
883  return size;
884 }
885 
886 /* used only when posting data */
887 static int http_write(URLContext *h, const uint8_t *buf, int size)
888 {
889  char temp[11] = ""; /* 32-bit hex + CRLF + nul */
890  int ret;
891  char crlf[] = "\r\n";
892  HTTPContext *s = h->priv_data;
893 
894  if (!s->chunked_post) {
895  /* non-chunked data is sent without any special encoding */
896  return ffurl_write(s->hd, buf, size);
897  }
898 
899  /* silently ignore zero-size data since chunk encoding that would
900  * signal EOF */
901  if (size > 0) {
902  /* upload data using chunked encoding */
903  snprintf(temp, sizeof(temp), "%x\r\n", size);
904 
905  if ((ret = ffurl_write(s->hd, temp, strlen(temp))) < 0 ||
906  (ret = ffurl_write(s->hd, buf, size)) < 0 ||
907  (ret = ffurl_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
908  return ret;
909  }
910  return size;
911 }
912 
913 static int http_shutdown(URLContext *h, int flags)
914 {
915  int ret = 0;
916  char footer[] = "0\r\n\r\n";
917  HTTPContext *s = h->priv_data;
918 
919  /* signal end of chunked encoding if used */
920  if ((flags & AVIO_FLAG_WRITE) && s->chunked_post) {
921  ret = ffurl_write(s->hd, footer, sizeof(footer) - 1);
922  ret = ret > 0 ? 0 : ret;
923  s->end_chunked_post = 1;
924  }
925 
926  return ret;
927 }
928 
929 static int http_close(URLContext *h)
930 {
931  int ret = 0;
932  HTTPContext *s = h->priv_data;
933 
934 #if CONFIG_ZLIB
935  inflateEnd(&s->inflate_stream);
936  av_freep(&s->inflate_buffer);
937 #endif /* CONFIG_ZLIB */
938 
939  if (!s->end_chunked_post)
940  /* Close the write direction by sending the end of chunked encoding. */
941  ret = http_shutdown(h, h->flags);
942 
943  if (s->hd)
944  ffurl_close(s->hd);
946  return ret;
947 }
948 
949 static int64_t http_seek(URLContext *h, int64_t off, int whence)
950 {
951  HTTPContext *s = h->priv_data;
952  URLContext *old_hd = s->hd;
953  int64_t old_off = s->off;
954  uint8_t old_buf[BUFFER_SIZE];
955  int old_buf_size, ret;
956  AVDictionary *options = NULL;
957 
958  if (whence == AVSEEK_SIZE)
959  return s->filesize;
960  else if ((whence == SEEK_CUR && off == 0) ||
961  (whence == SEEK_SET && off == s->off))
962  return s->off;
963  else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
964  return AVERROR(ENOSYS);
965 
966  /* we save the old context in case the seek fails */
967  old_buf_size = s->buf_end - s->buf_ptr;
968  memcpy(old_buf, s->buf_ptr, old_buf_size);
969  s->hd = NULL;
970  if (whence == SEEK_CUR)
971  off += s->off;
972  else if (whence == SEEK_END)
973  off += s->filesize;
974  s->off = off;
975 
976  /* if it fails, continue on old connection */
977  av_dict_copy(&options, s->chained_options, 0);
978  if ((ret = http_open_cnx(h, &options)) < 0) {
979  av_dict_free(&options);
980  memcpy(s->buffer, old_buf, old_buf_size);
981  s->buf_ptr = s->buffer;
982  s->buf_end = s->buffer + old_buf_size;
983  s->hd = old_hd;
984  s->off = old_off;
985  return ret;
986  }
987  av_dict_free(&options);
988  ffurl_close(old_hd);
989  return off;
990 }
991 
993 {
994  HTTPContext *s = h->priv_data;
995  return ffurl_get_file_handle(s->hd);
996 }
997 
998 #define HTTP_CLASS(flavor) \
999 static const AVClass flavor ## _context_class = { \
1000  .class_name = # flavor, \
1001  .item_name = av_default_item_name, \
1002  .option = options, \
1003  .version = LIBAVUTIL_VERSION_INT, \
1004 }
1005 
1006 #if CONFIG_HTTP_PROTOCOL
1007 HTTP_CLASS(http);
1008 
1009 URLProtocol ff_http_protocol = {
1010  .name = "http",
1011  .url_open2 = http_open,
1012  .url_read = http_read,
1013  .url_write = http_write,
1014  .url_seek = http_seek,
1015  .url_close = http_close,
1016  .url_get_file_handle = http_get_file_handle,
1017  .url_shutdown = http_shutdown,
1018  .priv_data_size = sizeof(HTTPContext),
1019  .priv_data_class = &http_context_class,
1021 };
1022 #endif /* CONFIG_HTTP_PROTOCOL */
1023 
1024 #if CONFIG_HTTPS_PROTOCOL
1025 HTTP_CLASS(https);
1026 
1027 URLProtocol ff_https_protocol = {
1028  .name = "https",
1029  .url_open2 = http_open,
1030  .url_read = http_read,
1031  .url_write = http_write,
1032  .url_seek = http_seek,
1033  .url_close = http_close,
1034  .url_get_file_handle = http_get_file_handle,
1035  .url_shutdown = http_shutdown,
1036  .priv_data_size = sizeof(HTTPContext),
1037  .priv_data_class = &https_context_class,
1039 };
1040 #endif /* CONFIG_HTTPS_PROTOCOL */
1041 
1042 #if CONFIG_HTTPPROXY_PROTOCOL
1043 static int http_proxy_close(URLContext *h)
1044 {
1045  HTTPContext *s = h->priv_data;
1046  if (s->hd)
1047  ffurl_close(s->hd);
1048  return 0;
1049 }
1050 
1051 static int http_proxy_open(URLContext *h, const char *uri, int flags)
1052 {
1053  HTTPContext *s = h->priv_data;
1054  char hostname[1024], hoststr[1024];
1055  char auth[1024], pathbuf[1024], *path;
1056  char lower_url[100];
1057  int port, ret = 0, attempts = 0;
1058  HTTPAuthType cur_auth_type;
1059  char *authstr;
1060  int new_loc;
1061 
1062  h->is_streamed = 1;
1063 
1064  av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
1065  pathbuf, sizeof(pathbuf), uri);
1066  ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);
1067  path = pathbuf;
1068  if (*path == '/')
1069  path++;
1070 
1071  ff_url_join(lower_url, sizeof(lower_url), "tcp", NULL, hostname, port,
1072  NULL);
1073 redo:
1074  ret = ffurl_open(&s->hd, lower_url, AVIO_FLAG_READ_WRITE,
1075  &h->interrupt_callback, NULL);
1076  if (ret < 0)
1077  return ret;
1078 
1079  authstr = ff_http_auth_create_response(&s->proxy_auth_state, auth,
1080  path, "CONNECT");
1081  snprintf(s->buffer, sizeof(s->buffer),
1082  "CONNECT %s HTTP/1.1\r\n"
1083  "Host: %s\r\n"
1084  "Connection: close\r\n"
1085  "%s%s"
1086  "\r\n",
1087  path,
1088  hoststr,
1089  authstr ? "Proxy-" : "", authstr ? authstr : "");
1090  av_freep(&authstr);
1091 
1092  if ((ret = ffurl_write(s->hd, s->buffer, strlen(s->buffer))) < 0)
1093  goto fail;
1094 
1095  s->buf_ptr = s->buffer;
1096  s->buf_end = s->buffer;
1097  s->line_count = 0;
1098  s->filesize = -1;
1099  cur_auth_type = s->proxy_auth_state.auth_type;
1100 
1101  /* Note: This uses buffering, potentially reading more than the
1102  * HTTP header. If tunneling a protocol where the server starts
1103  * the conversation, we might buffer part of that here, too.
1104  * Reading that requires using the proper ffurl_read() function
1105  * on this URLContext, not using the fd directly (as the tls
1106  * protocol does). This shouldn't be an issue for tls though,
1107  * since the client starts the conversation there, so there
1108  * is no extra data that we might buffer up here.
1109  */
1110  ret = http_read_header(h, &new_loc);
1111  if (ret < 0)
1112  goto fail;
1113 
1114  attempts++;
1115  if (s->http_code == 407 &&
1116  (cur_auth_type == HTTP_AUTH_NONE || s->proxy_auth_state.stale) &&
1117  s->proxy_auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2) {
1118  ffurl_close(s->hd);
1119  s->hd = NULL;
1120  goto redo;
1121  }
1122 
1123  if (s->http_code < 400)
1124  return 0;
1125  ret = AVERROR(EIO);
1126 
1127 fail:
1128  http_proxy_close(h);
1129  return ret;
1130 }
1131 
1132 static int http_proxy_write(URLContext *h, const uint8_t *buf, int size)
1133 {
1134  HTTPContext *s = h->priv_data;
1135  return ffurl_write(s->hd, buf, size);
1136 }
1137 
1138 URLProtocol ff_httpproxy_protocol = {
1139  .name = "httpproxy",
1140  .url_open = http_proxy_open,
1141  .url_read = http_buf_read,
1142  .url_write = http_proxy_write,
1143  .url_close = http_proxy_close,
1144  .url_get_file_handle = http_get_file_handle,
1145  .priv_data_size = sizeof(HTTPContext),
1146  .flags = URL_PROTOCOL_FLAG_NETWORK,
1147 };
1148 #endif /* CONFIG_HTTPPROXY_PROTOCOL */
static int http_get_line(HTTPContext *s, char *line, int line_size)
Definition: http.c:318
void av_url_split(char *proto, int proto_size, char *authorization, int authorization_size, char *hostname, int hostname_size, int *port_ptr, char *path, int path_size, const char *url)
Split a URL string into components.
Definition: utils.c:2713
static void parse_content_range(URLContext *h, const char *p)
Definition: http.c:371
AVDictionary * metadata
Definition: http.c:83
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
static int http_connect(URLContext *h, const char *path, const char *local_path, const char *hoststr, const char *auth, const char *proxyauth, int *new_location)
Definition: http.c:551
void ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Definition: url.c:80
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
int icy_data_read
Definition: http.c:78
int size
#define URL_PROTOCOL_FLAG_NETWORK
Definition: url.h:35
uint8_t * post_data
Definition: http.c:74
AVOption.
Definition: opt.h:234
#define AV_OPT_FLAG_EXPORT
The option is inteded for exporting values to the caller.
Definition: opt.h:275
HTTPAuthType
Authentication types, ordered from weakest to strongest.
Definition: httpauth.h:28
#define BUFFER_SIZE
Definition: http.c:45
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
static int http_close(URLContext *h)
Definition: http.c:929
int ffurl_write(URLContext *h, const unsigned char *buf, int size)
Write size bytes from buf to the resource accessed by h.
Definition: avio.c:276
char * av_stristr(const char *s1, const char *s2)
Locate the first case-independent occurrence in the string haystack of the string needle...
Definition: avstring.c:54
int is_streamed
true if streamed (no seek possible), default = false
Definition: url.h:48
AVIOInterruptCB interrupt_callback
Definition: url.h:50
HTTPAuthState proxy_auth_state
Definition: http.c:59
char * icy_metadata_headers
Definition: http.c:81
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:293
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:166
int flags
Definition: url.h:46
char * content_type
Definition: http.c:63
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
static int http_getc(HTTPContext *s)
Definition: http.c:301
HTTP Authentication state structure.
Definition: httpauth.h:55
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
#define MAX_URL_SIZE
Definition: internal.h:27
int end_chunked_post
Definition: http.c:69
int av_stristart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str independent of case.
Definition: avstring.c:43
static int http_get_file_handle(URLContext *h)
Definition: http.c:992
static int http_buf_read(URLContext *h, uint8_t *buf, int size)
Definition: http.c:694
uint8_t
int post_datalen
Definition: http.c:75
AVOptions.
miscellaneous OS support macros and functions.
static int http_read_header(URLContext *h, int *new_location)
Definition: http.c:526
#define HTTP_HEADERS_SIZE
Definition: http.h:27
static int http_open_cnx(URLContext *h, AVDictionary **options)
Definition: http.c:198
const char data[16]
Definition: mxf.c:70
int av_reallocp(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:140
static int flags
Definition: log.c:44
uint32_t tag
Definition: movenc.c:844
#define DEFAULT_USER_AGENT
Definition: http.c:97
#define AVERROR_EOF
End of file.
Definition: error.h:51
void ff_http_init_auth_state(URLContext *dest, const URLContext *src)
Initialize the authentication state based on another HTTP URLContext.
Definition: http.c:127
HTTP 1.0 Basic auth from RFC 1945 (also in RFC 2617)
Definition: httpauth.h:30
static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
Definition: http.c:137
int line_count
Definition: http.c:52
void av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:184
unsigned char * buf_end
Definition: http.c:51
static void update_metadata(HTTPContext *s, char *data)
Definition: http.c:807
int chunked_post
Definition: http.c:67
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
#define E
Definition: http.c:96
#define AVERROR(e)
Definition: error.h:43
static int http_write(URLContext *h, const uint8_t *buf, int size)
Definition: http.c:887
static const AVOption options[]
Definition: http.c:99
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:170
Definition: graph2dot.c:49
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:168
#define OFFSET(x)
Definition: http.c:94
int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.c:225
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:81
AVDictionary * chained_options
Definition: http.c:89
static int store_icy(URLContext *h, int size)
Definition: http.c:833
char * headers
Definition: http.c:60
char * user_agent
Definition: http.c:62
char * icy_metadata_packet
Definition: http.c:82
#define FFMIN(a, b)
Definition: common.h:57
int64_t off
Definition: http.c:56
int av_strcasecmp(const char *a, const char *b)
Definition: avstring.c:156
int64_t end_off
Definition: http.c:56
int send_expect_100
Definition: http.c:90
int willclose
Definition: http.c:66
int ff_http_match_no_proxy(const char *no_proxy, const char *hostname)
Definition: network.c:329
static char buffer[20]
Definition: seek-test.c:31
int ffurl_get_file_handle(URLContext *h)
Return the file descriptor associated with this URL.
Definition: avio.c:352
int stale
Auth ok, but needs to be resent with a new nonce.
Definition: httpauth.h:71
offset must point to a pointer immediately followed by an int for the length
Definition: opt.h:226
int ff_url_join(char *str, int size, const char *proto, const char *authorization, const char *hostname, int port, const char *fmt,...)
Definition: url.c:36
NULL
Definition: eval.c:55
static int http_read(URLContext *h, uint8_t *buf, int size)
Definition: http.c:870
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:213
Definition: url.h:41
#define AVIO_FLAG_READ_WRITE
read-write pseudo flag
Definition: avio.h:294
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:68
unsigned char buffer[BUFFER_SIZE]
Definition: http.c:51
Describe the class of an AVClass context structure.
Definition: log.h:33
#define SPACE_CHARS
Definition: internal.h:160
void * priv_data
Definition: url.h:44
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:99
int icy
Definition: http.c:76
char * ff_http_auth_create_response(HTTPAuthState *state, const char *auth, const char *path, const char *method)
Definition: httpauth.c:242
const char * name
Definition: url.h:54
URLContext * hd
Definition: http.c:50
static int has_header(const char *str, const char *header)
Definition: http.c:518
char * mime_type
Definition: http.c:61
int ffurl_close(URLContext *h)
Close the resource accessed by the URLContext h, and free the memory used by it.
Definition: avio.c:297
static int process_line(URLContext *h, char *line, int line_count, int *new_location)
Definition: http.c:442
int ff_http_do_new_request(URLContext *h, const char *uri)
Send a new HTTP request, reusing the old connection.
Definition: http.c:254
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:32
Main libavformat public API header.
#define MAX_REDIRECTS
Definition: http.c:46
static int parse_content_encoding(URLContext *h, const char *p)
Definition: http.c:385
int ffurl_open(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create an URLContext for accessing to the resource indicated by url, and open it. ...
Definition: avio.c:211
int http_code
Definition: http.c:53
static int http_open(URLContext *h, const char *uri, int flags, AVDictionary **options)
Definition: http.c:273
#define AVSEEK_SIZE
Passing this as the "whence" parameter to a seek function causes it to return the filesize without se...
Definition: avio.h:190
void ff_http_auth_handle_header(HTTPAuthState *state, const char *key, const char *value)
Definition: httpauth.c:90
int multiple_requests
Definition: http.c:73
HTTPAuthState auth_state
Definition: http.c:58
int len
static int parse_location(HTTPContext *s, const char *p)
Definition: http.c:357
int64_t filesize
Definition: http.c:56
char * location
Definition: http.c:57
static int http_shutdown(URLContext *h, int flags)
Definition: http.c:913
int icy_metaint
Definition: http.c:80
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:280
int end_header
Definition: http.c:71
unsigned char * buf_ptr
Definition: http.c:51
#define D
Definition: http.c:95
char * method
Definition: http.c:91
static int parse_icy(HTTPContext *s, const char *tag, const char *p)
Definition: http.c:420
HTTPAuthType auth_type
The currently chosen auth type.
Definition: httpauth.h:59
static int http_read_stream(URLContext *h, uint8_t *buf, int size)
Definition: http.c:752
static int http_read_stream_all(URLContext *h, uint8_t *buf, int size)
Definition: http.c:795
unbuffered private I/O API
static int64_t http_seek(URLContext *h, int64_t off, int whence)
Definition: http.c:949
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:212
int ffurl_read(URLContext *h, unsigned char *buf, int size)
Read up to size bytes from the resource accessed by h, and store the read bytes in buf...
Definition: avio.c:262
int64_t chunksize
Definition: http.c:55
#define HTTP_CLASS(flavor)
Definition: http.c:998
No authentication specified.
Definition: httpauth.h:29
static int check_http_code(URLContext *h, int http_code, const char *end)
Definition: http.c:342